Hi fellows, I'm getting the following error while issuing a full export, is there a way to solve this?

------
. exporting referential integrity constraints
. exporting posttables actions
EXP-00008: ORACLE error 2083 encountered
ORA-02083: database name has illegal character '.'
ORA-06512: at "SYS.DBMS_UTILITY", line 78
ORA-06512: at "SYS.DBMS_UTILITY", line 107
ORA-06512: at "SYS.DBMS_AQ_IMPORT_INTERNAL", line 552
ORA-06512: at line 1
ORA-06512: at "SYS.DBMS_SYS_SQL", line 787
ORA-06512: at "SYS.DBMS_SQL", line 328
ORA-06512: at "SYS.DBMS_EXPORT_EXTENSION", line 82
ORA-06512: at "SYS.DBMS_EXPORT_EXTENSION", line 133
ORA-06512: at line 1
EXP-00000: Export terminated unsuccessfully
-------

Thanks